Azure Xamarin Services
Deliver apps with a single shared .NET code base
Xamarin is an open source app platform from Microsoft for building modern and performant apps with C# and .NET. Xamarin extends the .NET developer platform with tools and libraries specifically for building apps for Android, iOS, tvOS, watchOS, macOS, and Windows. The base .NET platform provides components that apply to all different types of apps. Additional frameworks, such as Xamarin, extend .NET with components for building specific types of apps.